[SeaBIOS] [PATCH 1/3] Add generic qemu detection

Gerd Hoffmann kraxel at redhat.com
Mon Sep 16 14:27:37 CEST 2013

On Mo, 2013-09-16 at 14:10 +0300, Gleb Natapov wrote:
> On Mon, Sep 16, 2013 at 12:36:28PM +0200, Gerd Hoffmann wrote:
> > This patch adds support for detecting whenever SeaBIOS runs on qemu
> > or not.  This is done by looking at the northbridge (pci device 00:00.0)
> > and check the subsystem id.  Most pci devices emulated by qemu -- the
> > two northbridges i440fx and q35 included -- have a subsystem id of
> > "1af4:1100".
> > 
> > In case the subsystem ID matches set PF_QEMU, log a message (including
> > the northbridge found while being at it) and also check for kvm.
> > 
> What if other userspace will want to write enough support to run Seabios
> as a guest? Why kvm detection depends on QEMU?

What other userspace?  There is none today.  And if that changes some
day we'll just call kvm_detect() in the init code for $otheruserspace.


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